Modeling and analyzing cascading dynamics of the urban road traffic network

The cascade failure problem has gained an increasing interest in urban road traffic network. Considering the intrinsic characteristics of urban traffic network, the traffic load has its specific regularity and traffic driving has certain preferences, this paper introduces the average distance and the state change time of road junction. Using the weighted method to combine the two aspects, a trust value model is got to measure the road congestion. Then in order to avoid the congestion of the failed road junction again in a short time, the multiple overload of the failed road junction is redistributed according to the trust value model. Finally, the cascade failure model is obtained. The cascade failure model is verified in scale-free network and random network. The joint parameters of load threshold and load allocation factor that can control the cascade failure scale in a certain range are obtained, which improves the robustness of the networks. (C) 2020 Elsevier B.V. All rights reserved.

级联失效问题在城市道路交通网络中受到越来越多的关注。考虑到城市交通网络的内在特性，交通流量有其特定的规律性，且交通行驶具有一定的偏好，本文引入了道路交叉口的平均距离和状态变化时间。利用加权方法将这两个方面结合起来，得到一个信任值模型来衡量道路拥堵情况。然后为了避免失效的道路交叉口在短时间内再次拥堵，根据信任值模型对失效道路交叉口的多重过载进行重新分配。最终得到级联失效模型。该级联失效模型在无标度网络和随机网络中得到了验证。获得了能将级联失效规模控制在一定范围内的负载阈值和负载分配因子的联合参数，提高了网络的鲁棒性。版权所有©2020爱思唯尔有限公司。保留所有权利。